vphadddq

Vector Packed Horizontal Add Doubleword to Quadword

VPHADDDQ xmm1, xmm2/m128

Adds adjacent doublewords to quadwords.

Pseudocode Operation

for i = 0 to 1:
  result[i*64:(i*64)+63] ← sign_extend_64(src[(i*2)*32:(i*2)*32+31]) +
                            sign_extend_64(src[(i*2+1)*32:(i*2+1)*32+31])
dest ← result

Encoding

Binary Layout
VEX
+0
opcode
+3
ModRM
+4
 
Format XOP
Opcode XOP.128.09.W0 CB /r
Extension XOP

Operands

  • dest
    128-bit XMM SIMD register
  • src
    128-bit XMM SIMD register or Memory operand

Related

More in XOP

Reference

View in Intel® 64 and IA-32 Architectures SDM ↗ AMD APM

Instruction Forms

Opcode Instruction Op/En 64/32-bit Mode CPUID Description
8F RXB.09 0.1111.0.00 CB /r VPHADDDQ xmm1, xmm2/mem128

Description

Signed Doubleword to Signed Quadword Adds each adjacent pair of signed doubleword integer values of the source and packs the signextended sums into the corresponding quadword of the destination. There are two operands: VPHADDDQ dest, src The source is either an XMM register or a 128-bit memory location and the destination is an XMM register. Bits [255:128] of the corresponding YMM register are cleared.

Flags Affected

None None

Exceptions

Exceptions

Mode Exception Cause of Exception Real Virt Prot X Instruction not supported, as indicated by CPUID feature identifier. X X XOP instructions are only recognized in protected mode. X CR4.OSXSAVE = 0, indicated by CPUID Fn0000_0001_ECX[OSXSAVE]. X XFEATURE_ENABLED_MASK[2:1] ! = 11b. Invalid opcode, #UD X XOP.W = 1. A XOP.vvvv ! = 1111b. X XOP.L = 1. X REX, F2, F3, or 66 prefix preceding XOP prefix. X Lock prefix (F0h) preceding opcode. Device not available, #NM X CR0.TS = 1. Stack, #SS X Memory address exceeding stack segment limit or non-canonical. X Memory address exceeding data segment limit or non-canonical. General protection, #GP X Null data segment used to reference memory. Page fault, #PF X Instruction execution caused a page fault. Alignment check, #AC X Memory operand not 16-byte aligned when alignment checking enabled. X - XOP exception 768 [AMDVPHADDDQPublic Use] Instruction Reference